LOCATION PINGREE IDEstablished Series
TAXONOMIC CLASS: Loamy, mixed, superactive, nonacid, frigid Lithic Xeric Torriorthents
TYPICAL PEDON: Pingree stony silt loam on a convex slope of 3 percent under rangeland at 5,000 feet elevation. (Colors are for dry soil unless otherwise stated. When described on June 5, 1979, the soil was dry throughout.)
A--0 to 2 inches; pale brown (10YR 6/3) stony silt loam, dark brown (10YR 3/3) moist; weak coarse platy structure; slightly hard, very friable, slightly sticky and slightly plastic; few fine and medium roots; many fine vesicular pores; desert pavement present; 15 percent basalt gravel 3 percent basalt cobbles and 2 percent basalt stones; slightly alkaline (pH 7.8); clear smooth boundary. (1 to 3 inches thick)
Bw1--2 to 7 inches; pale brown (10YR 6/3) gravelly silt loam, brown (10YR 4/3) moist; medium fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; few very fine roots; few fine tubular pores; 10 percent basalt gravel and 5 percent basalt stones; slightly alkaline (pH 7.6); clear smooth boundary. (2 to 7 inches thick)
Bw2--7 to 9 inches; pale brown (10YR 6/3) cobbly silt loam, brown (10YR 4/3) moist; weak fine subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; few fine and medium roots; few fine tubular pores; 10 percent basalt gravel, 15 percent basalt cobbles and 5 percent basalt stones; slightly alkaline (pH 7.4); abrupt, wavy boundary. (1 to 6 inches thick)
2R--9 inches; fractured basalt (fractures are 4 to 20 inches apart).
TYPE LOCATION: Butte County, Idaho; about 4 miles northwest of Atomic City, Idaho; 1,640 feet east and 1,000 feet south of the northwest corner of sec. 22, T.2 N., R.30 E.
Latitude - 43 degrees, 28 minutes, 53 seconds North
Longitude - 112 degrees, 52 minutes, 08 seconds West
RANGE IN CHARACTERISTICS:
The soil moisture control section is dry for one-half to three-fourths of the time when the soil temperature is above 41 degrees F; dry for 70 to 85 consecutive days.
Average annual soil temperature - 44 to 47 degrees F.
Average summer soil temperature - 62 to 66 degrees F.
Depth to bedrock - 5 to 10 inches
Particle-size control section
Percent clay - 15 to 22
Percent rock fragments averages - 15 to 25
Reaction - slightly or moderately alkaline
A horizon
Color value, moist - 3 or 4; dry 5 or 6
Color chroma, moist or dry, 3 or 4
B horizon
Color value, moist - 5 to 7; dry, 6 or 7
Color chroma, moist or dry - 3 or 4
COMPETING SERIES: There are no competing series.
GEOGRAPHIC SETTING: These soils occur on lava plains at elevations from 4,500 to 5,400 feet. Slopes range from 0 to 15 percent. The soils formed in loess and material weathered from basalt. The climate is semiarid with dry summers and cold moist winters. Mean annual precipitation is 9 to 12 inches. The mean annual air temperature is 44 to 46 degrees F. The freeze-free period is 80 to 110 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Argon, Bondfarm, Deuce, Polatis and Tenno soils. The Argon and Polatis soils are moderately deep to basalt and are in concave positions. The Bondfarm, Deuce, and Tenno soils are shallow to basalt.
DRAINAGE AND PERMEABILITY: Well drained; moderate permeability.
USE AND VEGETATION: Used primarily for wildlife habitat. The principal native plants are Wyoming big sagebrush, bluebunch wheatgrass, and sandberg bluegrass.
DISTRIBUTION AND EXTENT: Southeastern Idaho on the Snake River Plain. The soils are inextensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon
SERIES ESTABLISHED: Butte County Area, Idaho, 1997.
REMARKS: Diagnostic horizons and other features:
Ochric epipedon
Lithic contact at 9 inches
Particle-size control section - whole soil profile.